Printing machine



ct. 7 1924. 1,510,513 v 'W. E. VERKLER A PRINTING MACHINE Filed March 31 1923 2 Sheets-Sheet 1 pl l #33 i I /2 =i T L 7 y 9J N :D .y 22

1 2 L I Ll 24 --."5 l l \'7 l T: v \32l j l /4 Z Oct. 7 1324.

1,510,513 W. E. VERKLER PRINTING MACHINE Filed March 31 1.923 2 Sheets-Sheet 2 Patented Get. 7, m24.

emr

WALTER E. VERKLER, F CHICAGO, ILLINOIS.

PRINTING MACHINE.

Application filed March 31, 1923. Serial N0. 628,984.V

To all whom t may concern.'

a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful'lmprovements in Printing Machines,-

of which the following is a specification.

My invention-relates to improvements in printing machines and has for itsprincipal object the provision of an improved construction of this character which will be highly efficient in use. VAmong other obl'ects of theinvention is the provision for checking the speed of rotation of the printing drum of the machine so that the speed of rotation will be uniform when the printing drum is operated.

Other objects of the invention will appear hereinafter.

`The invention consists in the combinations and arrangements of parts hereinafter described and claimed. c

The invention will be best understood by reference to the accompanying drawings forming a part of this specification and in which,

, Fig. 1, is an elevational view of a printing machine embodying the invention;

Fig. 2, is a sectional view taken substantially on line 2-2 of Fig; 1; v y A Fig. 3, is a sectional view taken lsubstantially on line 3-3 Vof Fig. 1.;

Fig. 4, is a fragmentary side elevational view of the invention showing the brake mechanism associated therewith, and I Fig. 5, is a fragmentary sectional view ltaken.substantially on line 5 5 of Fig. 4.

Referring to the drawings 9 and 10 indicate the end frames of the printing machine A, 11 indicates the printing drum, 12`-indi cates the operating handle and 13 indicates a part of the paper feeding mechanism.

The printing drum 12 carries the usual removable printing cylinder 14 over the outer surfaces of which a ribbon, not shown, is passed and carried by rollers 15. The printing cylinder 14 1s a segmental plate semi-circular in cross section and is mounted on the printing drumV in the usual manner. At lone side 16 of the printing drum and directlyl beneath the printing vcylinder are web members 17 of substantial thickness that serve as counterbalances. i

The above structure so' far -setl forth is embodied in'rmost printing machines of the approved type and constitutes no part of the present invention, these parts being merely mentioned so thatthe invention will be more fully hereinafter understood.

In carrying out the objects of my invention I provide an additional coun-terbalance which is mounted on the opposite side- 18 of the printing drum and on the side of the drum farthest away from the printing cyl! inder, said counterb-alance being indicated at 19 and is fixed to the end 18 of the print'- ing drum by suitable screws 20. This counterbalance is preferably equal to the weight of the counterbalance 17 and is capable of equalizing the rotation of the printing drum when. the printing cylinder is'removed therefrom. This pro-vision ofthe Y,

additional counterbalance also serves to facilitate the mounting of the printing cylirider on the printing drum by reason of the fact that the additional weight balances the printing drum when idle and therefore .will

nothave the tendency to rotate during the mounting of thepvprinting cylinder on the printing `drum by reasonfof Vhaving .a greater weight on one sideofthe axis of krotation than thev other. 1

When the printing cylinder is mounted on Ithe printing drum and when the drum is rotated, the printing cylinder during downward rotation due to itsow'n weight, will naturally increase the speed of the printing drum. I therefore aim to regulate the speed of the printing drum so-.that the samefwill be uniform and I accomplish this object by `providing a brake mechanism, the construc- `tion and arrangement of which 1s as. followsrv Y .Y v

Referring' especially to Figs. 4 5, 21 indicates an arm fixedto thev end' frame 10 of the machine` A bysuitabley screws 22 and having a bent portion 23 which is Abent inwardly inrspaced' relation with ythe peripheral edge 24 of the end frame A10.4y The bent end 23 carries a vertical arm 25v`having spaced threaded openings 26 formed loo therein. A brake shoe is indicated at 27 A and carries a brake. lining 28 of suitable material such as leather or the like and is adjustably carried by set screws 29 threaded through the openings 26 and having heads 30 mounted for free rotation in recesses 3l formed in the brake shoe 27. lt will be seen by manipulating the set screws 29 that the brake shoe can be adjusted away from or toward the arm 25.

In most approved types of printingV machines there is provided a band, which in this instance is indicated at 32 and extends around the printing drum llat one end thereof, this band is used in connection wit-h other mechanism Vfor regulating the feed of the paper through the machine and is provided with elevated portions 33 which eX- tend half-wav around the printing drum adjacent the place where the printing` cyl inder is mounted. The brake shoe 27 isl adapted for engagement with the peripheral elevated side of this band and as already` indicated, the brake shoe can be adjustedA toward or away from the peripheral side of the band.

inasmuch as the printing cylinder is mounted on the side of the printing drum opposite that where the elevated portion is located it will be seen that upon rotation of the drum and during the downward movement of the printing cylinder the elevated portion will engage the brake shoe lining and thereby be prevented from increasing speed of rotation thus checking such increase of speed that would 'be otherwise brought about by the weight of the printing cylinder.

It will be apparent from the description herein that I provide a construction or an attachment to a. printing machine designed especially to keep the speed of the printing drum uniform during operation and by doing sol prevent the less of large amount of paper whichis damaged by the blurring of the print thereon due to the increased speed of the printing drum brought about by the printing cylinder when the cylindertravels vdownwardly during rotation.

lt will also be apparent that the structure herein is simple and can be manufactured as an attachment at an economical cost.

TWhile I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departng from the spirit of the inventon; I, therefore, doV not wish to be limitedv to the precise details of construction set forth but desire to avail myself of such variations andmodiiic'ations as come within the scope ofthe appended claims.

Having described my invention what I claimasnew and desire to secure by Letters Patent, is:

1. In combination with a printing drum carrying a printing cylinder semi-circular in cross section and having a counterbalance at one end adjacent the printing cylinder, a second counterbalance at the other end of the drum opposite the printing cylinder,

and means for regulating the speed of rotation of the drum.

2. ln combination with a printing drum carrying a printing cylinder semi-circular in cross section and having a counterbalance at one end adjacent the printing cylinder, a second counterbalance at the other end of the drum opposite the printing cylinder', and adjustable means for regulating the speed of rotation of the drum.

3. In combination with a printing drum carrying a printing cylinder semi-circular in cross secton and having a counterbalance at one end adjacent the printing cylinder, a second counterbalance at the other end of the drum opposite the printing cylinder, and. a brake shoe for engagement with the drum adapted to regulate the speed of rotation of the drun j d. ln combination with a printing drum carrying a printing cylinder semi-circular in cross section and having a counterbalance at one end adjacent the printing cylinder, a second counterbalance at the other end of the drum opposite the printing cylinder,

and an adjustable brake shoe for engagement with the drum adapted to regulate the speed of rotation of the drum.

5. ln combination with a printing machine including end frames, a printing drum carrying a printing cylinder semi-circular in cross'section and having a counterbalance at one end adjacent theV cylinder, a second counterbalance at the other end of the drum opposite the cylinder, a bracket carried by one of the end frames and having a bent portion in spaced relation with the edge of the frame, a brake shoe carried by the bracket for engagement with the drum to regulate the speed of rotation of the drum.

6. ln combination with a printing machine including end frames, a printing drum carrying a printing cylinder semi-circular in cross section and having a counterbalance at one end adjacentV the cylinder, a second counterbalance at the other end of the .drum opposite the cylinder, a bracket carried by one of the end frames and having a bent portion in spaced relation with the edge of the frame, and an adjustable brake shoe carried by the bracket for engagement with the drum to regulate the speed of rotation of the drum.

7. in combination with a printing drum carrying a printing cylinder semi-circular in cross section and provided with a band provided with an elevated port-ion and having a counterbalance at one end thereof adjacent the printing cylinder, and means for engagement with the elevated portion of the band for regulating the Speed of engagement with the elevated portion of the rotation of the drum. band for regulating the speed of rotation 8. In combination With a printing drum of the drum. carrying a printing cylinder semi-circular In testimony whereof I have signed my 5 in cross section and provided With a band name to this specification in the presence l5 provided With an elevated portion and havof tWo subscribing Witnesses.

. ing a counterbalance at one end thereof adja- WALTER E. VERKLER.

cent the printing cylinder, a second oounter- Witnesses: balance at the other end of the drum op- JOSHUA R. H. Po'r'rs,

l0 posite the printing cylinder, and means for CLARENCE E. THREEDY. 

